Effect of using Acacia mearnsii tannin extract as a feed additive on nutritional variables and productive performance in dairy cows grazing a temperate pasture

Abstract

This study was carried out to evaluate the impact of including Acacia mearnsii tannin extract (TA) as a feed additive on nutrition and productive performance of dairy cows grazing a high-quality temperate pasture and receiving supplementation with a concentrate feedstuff. Fourteen multiparous Holstein cows were assigned to either of the following treatments: concentrate without or with 20 g TA/kg dry matter (DM). Concentrate intake accounted for 32% of the total DM intake. Tannin addition increased the herbage DM intake by 22% (p < .05). There was no effect of TA inclusion on milk yield, milk composition, milk nitrogen (N) excretion, milk and plasma urea-N concentration, urinary excretion of total N, urea-N, and purine derivatives. However, TA inclusion increased the N intake and retention, total N excretion in manure, fecal N to urine N ratio, and decreased the dietary N efficiency for milk production and the percentage of ingested N excreted in urine (p < .05). In conclusion, supplementing dairy cows grazing a high-quality temperate pasture with a concentrate containing 20 g TA/kg DM showed the potential of decreasing the proportion of ingested N excreted in urine without affecting the productive performance.

Use of tannin extract as a strategy to reduce methane in Nellore and Holstein cattle and its effect on intake, digestibility, microbial efficiency and ruminal fermentation

“…However, in the present study, we found that the inclusion of tannins greater than 0.85% of DM promoted a linear reduction (Figure 2) in microbial synthesis, possibly due to the reduction in the digestibility of several nutrients, mainly with the linear reduction of the total apparent digestibility of OM; that is, tannin levels above 0.85% of the DM indirectly affect the microbial synthesis and did not improve the synchrony of nutrient use since microbial efficiency in relation to degraded OM was maintained. The results of the present study are in line with the study of Orlandi et al (2020), who used tannins from A. mearnsii extract (2% DM) for Holstein cows, as well as in the study of Mezzomo et al (2011), who used tannins from quebracho extract (0.4% of DM) for Nellore beef cattle.…”

“…relation to degraded OM was maintained. The results of the present study are in line with the study of Orlandi et al (2020), who used tannins from A. mearnsii extract (2% DM) for Holstein cows, as well as in the study of Mezzomo et al (2011), who used tannins from quebracho extract (0.4% of DM) for Nellore beef cattle.…”

Nitrogen balance of goat kids fed diets containing peach palm meal

“…The diets with PP present an increase in the unsaturated fatty acids content and lignin/NDF ratio, especially in the diets containing 85% of PP replacing corn (Table 1), which is related to the negative implication that lipids and bioactive secondary compounds have on ruminal fermentation and feed digestibility by inhibiting microbial growth (Silva et al, 2019;Amira et al, 2014;Martinele et al, 2008;Clement et al, 2004;Nutrient…, 2001). These characteristics of the peach palm meal composition could explain The N retention is a result of the difference between ingested N and excreted N through feces and urine (Orlandi et al, 2020;Huntington and Archibeque, 1999), it was observed a linear decrease in N intake and increase in urinary N excretion as the PP replaced corn in the concentrated. This reflected in the reduction of N retention from the levels 28.9, 33.3, and 45.1%, when expressed in day -1 , % ingested N, and % digested N respectively (Table 2).…”

“…The pulp is a waste that could be used for the production of peach palm meal (PP) as an alternative feedstuff for ruminants (Santos et al, 2016), but for that, it is necessary to know inclusion levels that guarantee animal productivity. This waste contains oil contents ranging from 20 to 620 g kg −1 of DM (Pereira et al, 2019b;Gomez et al, 1998;Murillo et al, 1991Murillo et al, , 1983, depending on the amount added to the diet can promote rumen fermentation modification and thus to affect microbial efficiency (Palmquist and Mattos, 2011). In this regard, modifications in the microbial utilization of protein and energy can occur, promoting an increase in urinary urea excretion and negative nitrogen retention.…”

Polyphenols for Livestock Feed: Sustainable Perspectives for Animal Husbandry?

“…Milk yield and its protein content are differently modulated when tannin extracts are supplemented; Acacia mearnsii tannin extract appeared to not affect MY [79,[139][140][141][142][143][144] or to negatively impact milk protein [139,140,[145][146][147].…”